One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,5)(3,6,7,8)(11,15)(14,16)(17,18,23,27)(19,28,31,43)(20,33,21,25)(22,36,37,26)(24,38,40,32)(29,44,30,42)(34,41,35,48)(39,45,47,46)(9,10)(11,14)(12,13)(15,16)(17,19,22,32,23,31,37,38)(18,24,26,28,27,40,36,43)(20,29,34,45,21,30,35,46)(25,39,41,42,33,47,48,44)(2,5)(6,8)(10,13)(14,16)(17,20,23,21)(18,25,27,33)(19,29,31,30)(22,34,37,35)(24,39,40,47)(26,41,36,48)(28,42,43,44)(32,45,38,46)(1,3,4,7)(2,6,5,8)(10,13)(14,16)(17,21,23,20)(18,25,27,33)(19,30,31,29)(22,35,37,34)(24,39,40,47)(26,41,36,48)(28,42,43,44)(32,46,38,45)(9,11,12,15)(10,14,13,16)(19,31)(20,21)(24,40)(25,33)(28,43)(32,38)(34,35)(41,48)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.